Jolter



Dec. 6, 1932. w. H. WANGELIN Q JOLTER Filed June 16, 1950 .2 Sheets-Sh et l ll T Mus/Wale A 7'7'0/E/YEY Dec. 6, 1932. t w H, WANGEUN JOLTER Filed June 16. 1930 2 Sheets-Sheet, 2

iv Arrolewiy Patented Dec. 6, 1932 WALTER H. WAN GELIN,

PATENT OFFICE OF ST. LOUIS, MISSOURI Application filed June 16,

This invention relates generally to jolters of the type employed in foundries for jolting flasks so that the sand will be firmly packed therein, and particularly to an improved jolter of this type which is so constructed and arranged that the load thereon is partly counterbalanced, the predominant object of the invention being to provide a jolter which is so constructed that the necessary power applied to elevate the flask during the jolting operation is proportionately less than was the case heretofore when the entire load of the flask was elevated by power applied thereto.

Another important object of the invention is to provide a jolter of the type referred to which instead of jolting the flask by causing the flask supporting element thereof to be stopped abruptly at the bottom of its downward movement as heretofore, includes movable jolting means which strikes the flask supporting element a sharp blow. Because of this arrangement the jolting operation is performed in a much more eflicient and complete manner than heretofore.

Figure 1 is a view of my improved jolter showing same partly in elevation and partly in horizontal section.

Figure 2 is a section on the staggered line 22 of Figure 1.

Figure 3 is asection on line 3-3 of Figure 1.

Figure 1 is a section on line 1-4 of Figure 1.

Figure 5 is a fragmentary sectional detail illustrating a modified form of the invention.

In the drawings, wherein is shown for the purpose of illustration, merely, two embodibearings 2 support a shaft 3 which extends transversely of the jolter, said shaft 3 being divided at its approximate center and the adjacent inner ends of said shaft being connected by a coupling element 4 (Figure 1). The inner end portions of the sections of the 1930. Serial no. 461,416.

shaft 3 are extended into apertures 5 formed in the coupling element 4.

The bearings 52', referred to, support a shaft 6, which, like the shaft 3, extends transversely of the jolter and is divided at its approximate center. The inner ends of the sections of this shaft 6 are connected by a coupling element 7, the adjacent inner end por tions of said shaft sections being extended into apertures 8 in said coupling element; The coupling elements 4 and 7 arearranged in alinement with respect to each other, and each coupling element is provided with an opening 9 formed therethrough, the openings 9 being extended at an approximate right angle with relation to the direction of extension of the shafts 3 and 6. The openings 9 are preferably provided with bushings 10, and 11 designates a shaft which is supported for rotation in the bushed o enings 9 of the coupling elements. The sha t 11 is the power shaft of the jolter, said shaft, in the drawings, beingprovided withan operating wheel 12 with the aid of which rotary motion may be applied thereto. This operating wheel 12' is illustrated, merely, for convenience, it being obvious that instead of employing an operating wheel the shaft 11 may be rotated by any suitable power element.

Pivotally supported by the shaft 3 is a jolting member 13 and pivotally supported by the shaft 6 is a similar jolting member 14.

When viewed in plan as shown in Figure 1 each of the jolting members is substantially U-shaped; that is to say, a portion 15 of each thereof extends transversely of the jolter and bifurcated legs 16 extend outwardly from said portions 15. The shafts 3 and 6 extend through openings formed in the legs 901i 16 ofthe jolting members and inthis manner said olt1ng members are pivotally supported by said shafts. Fixed to the arcuate faces 17 at the inner ends of the jolting members 13 and 14: are pairs of toothed segments 18, each pair of segments comprising a segment fixed to the jolting member 13 and a similar segment fixed to the jolting member 14 the teeth of which'mesh with the teeth of the first mentioned segment. The toothed segments 18 serve to compel the j olting members 22 which are provided at their opposite ends with downwardly extendedjsportions, 23., vAt,v

the lower end thereof each of the extensions 23 is provided with a bearing portion 24- (Figure 2) through which an opening 25 is formed. The downwardly extended por tions 23. at one side of the flasks support 19.

are'pivotally connected to the outer ends of the legs 16 of the j olting member 13 by means of pins 26 which pass through theopenin'gs 25 andthrough similar openlngs in said legs 16, while the downwardly extended portions 23 at the opposite side of the flasksupport are similarly pivotall I connected to the outer ends of thelegs -16 o the jolting member 14 by pins27. It is obvious in view of this arrangement that when the inner ends of" the pivotally supported jolting members 13 and 14 are moved downwardly the outer ends of said jolting members will be moved-upwardly whereby corresponding upward movement will be imparted to the flask support." It is likewise plain that when the inner ends of the jolting members are permitted to move upwardly the flask support will move downwardly. The jolting members 13 and 14' are provided with openings 28 through which the power shaft 11 extends and because of the'pivotal movement to which said jolting'i'members are 1 subjected, these openings havet'the approximate shape illustrated in ri es a a x v t'tlie'opposite ends of the-portions 15 of the jolting'members Band 14, saidjolting members are provided with s'crewthread'ed openings 29 and at theup'per end of each of these openings a bumper 30 formed of rubber or other suitable material is arranged. The

lower'end of each of the bumpers 30 contacts with a nut 31 (Figure 2) which is. screwed in the associated screw-threaded opening 29 and the bumper 30 maybe adjustedIoutwardly and inwardly with respect tofthe 'screwthreaded opening"brmahipulafing the nut 31. 32 design atesa hollow lock-nut which i is adapted'to lock the associated nut 31 in pla ce,'said lock-nut being hollow'to permit of a screwdriver being inserted therethrough' for thepurpose 'of'rotat'ing the nut 31.' Ar-' ranged inverti'calalinement with the bumpers 30 are portions 33 which extends downwardly from: the elements 22,; each of said" portions 33being providedat its lower end with. a head 34. v

Pivotallj suspended from the inner ends f i re ease-e be s m l s rw.

flask thereon will be elevate ture 35 which supports a roller 36 at its lower end. The structure 35 comprises a pair of arms 37 which are pivoted at their upper ends to the jolting member 13 and a pair of similar arms 38 which are pivoted at their upper ends to the jolting member 14. The pivotal connection between the arms 37 and 38 and the jolting members 13 and 14 is affected by bars 39 one of which is interposed between the arms of each pair of arms. These bars are provided eachwith reduced end portions 40 of circular cross-section which extend through apertures in the arms and are seated in recesses 41 formed in the jolting members (Figure 4) At the lower ends of each pair of, arms a bar 42 is interposedbetween said arms and thisbar, also, is provided with re duced end portions 43' which extend into apertures inthe lower end portions of the arms so that said bar '42 is capable'ofrotary;motion with respect to said arms. The roller 36. is

mounted on a rod 44 which is supportedv by the bars 42 associated with the oppositely disposed pairs of'arms 37v and 38. In view of thepivotal arrangement of the structure 3.5

it is plainthat the roller 36 may move upwardly and downwardly in a straight line while'the upper end portions of the arms, 37 and 38 move in an arc of circle with the inner end portions of the jolting members 13 and '14. Fixedly mounted on the' power shaft 11 so that it will contact with theroller. 36 is a cam 45 which is shaped approximately as illustrated in Figure 4.

In the operation of, my improved jolter the flask to be joltedis arran ed on the flask support 19. The power sha a t v11 is then rotated and as the highportion'of the cam 45 moves in contact with the roller 36 the inner ends of the j olting members are; drawn downwardly.r; This will'have'the eflect, as already stated, of raising the outer ends of. the 1' citingmembers whereby the flasksugport and the 7 upward movement the, high vportion of the when the cam 45 will pass beyond the roller 36 and i gravity will cause the flask and flask sup port to move downwardly at a fast rate of speed. The downward movement of'the flask support will, of course, move the outer ends of the jolting members 13 and 14 downwardly because of thepivotal connection be.- tween these parts and such downward movement off-the outer ends of; said jolting mem bers 'will result in the inner ends thereof being moved upwardly, The heads 3'4 of the' portions 33'of the flask support move down-'" wardly. with saidiflask support, and the bumpers 30 carried by jzolting members 13 and 14 movefupwardly with the inner end portion of said;- jolting -members,' and when the flasksupport reaches the approximate bottom of its movementthe bumpers 3.0 strike the heads 34' a sharp blow. The eifectof this upwardly directed blow coming at a time when the flask is moving downwardly causes the sand to be compacted in the flask in a very eflicient manner and eliminates the necessity for the heavy jar heretofore thought essential in the operation of jolting machines.

In the form of the invention illustrated in Figure 5, I eliminate the pivoted structure 35 and secure the roller 36 directly to the flask support 19. Aside from this change a jolter which includes the structure illustrated in Figure 5 would be constructed just as is the jolter illustrated in Figures 1 to 4 inclusive.

An important feature of this invention resides in the fact that the portions 15 of the jolting members 13 and 14 are made quite heavy and, therefore, these portions serve to counterbalance the weight of the flask support 19 and the flask thereon. These portions 15 of the jolting members may be of such weight that the combined weight of the flask support and flask outweigh said portions 15 only slightly, and the power necessary to elevate the flask support and flask need be suflicient only to lift the difference between the combined weight of the flask support and flask, and said portions 15. Thus in addition to the advantage of producing a olter which will more efficiently perform its function, a great saving in energy is realized and smaller equipment may be used to perform the tasks formerly necessitating the use of larger and more expensive equipment.

So that the weight of the portions 15 of the j olting members 13 and 14 may be regulated, I provide wells 46 in which suitable weights 47 may be located.

While I show in the drawings and describe in the specification a precise means for elevating the flask support, I wish it to be under stood that the invention is not limited to the use of such means as any suitable means for elevating the flask support may be employed.

: In other words the invention in its broadest aspect comprises a j olter of any suitable construction, which is provided with one or more pivoted members which serve to counterbalance the flask support and the load thereon, or counterbalance the flask support and its load and act as j olting elements.

I claim:

1. A jolter comprising a flask support, means for elevating said flask support, said means including a pivotally supported memher having a portion for subjecting said flask support to a sharp blow, said portion being movable upwardly into sharp contact with the flask support when said flask support is moving downwardly, and means for pivotally connecting said pivotally supported member to said flask support.

2. A jolter comprising a flask support, means for elevating said flask support, said means including a pivotally supported member having a portion for subjecting said flask support to a sharp blow upon downward movement of said flask support, said portion of said pivotally supported member constituting a counterweight for said flask support and being movable upwardly into sharp contact with the flask support when said flask support is moving downwardly, and means for pivotally connecting said pivotally supported member to said flask support.

3. A jolter comprising a flask support, means including a cam for elevating said flask support, a pivotally supported member having a portion movable in a direction opposite to that in which the flask support moves for subjecting said flask support to a sharp blow upon downward movement of said flask support, said portion of said pivotally supported member constituting a counterweight for said flask support, and means for pivotally connecting said pivotally supported member to said flask support.

4. A jolter comprising a flask support, means including a cam for elevating said flask support, a pivotally supported member having a portion movable in a direction opposite to that in which the flask support moves for subjecting said flask support to a sharp blow upon downward movement of said flask support, said cam being cooperable with said pivotally supported member for the purpose of imparting movement thereto, and means for pivotally connecting said pivotally supported member to said flask support.

5. A jolter comprising a flask support, means including a cam for elevating said flask support, a pivotally supported member having a portion movable in a direction opposite to that in which that flask support moves for subjecting said flask support to a sharp blow upon downward movement of said flask support, said cam being cooperable with said pivotally supported member for the purpose of imparting movement thereto, means for pivotally connecting said pivotally sup ported member to said flask support, said portion of said pivotally supported member constituting a counterweight for the flask support.

6. A jolter comprising a flask support, means for elevating said flask support, a pair of pivotally supported members having portions movable in a direction opposite to that in which the flask support moves for subjecting said flask support to sharp blows upon downward movement of said flask support, means for pivotally connecting said pivotal- 1y supported members to said flask support, and interengaging means on said pivotally supported members for compelling movement thereof in unison.

7. A jolter comprising a flask support, means for elevating said flask support, a pair of pivotally supported members having portions movablefin a direction opposite to that: in which the flask support moves for subjecting said flask support to. sharp blows upon downward movement of said flask support, -1neans for pivotally connecting said pivotally supported members to said flask support, and interengaging means comprising toothed seg ments on said pivotally supported members for compelling movement thereof in unison. m 8. A j olter comprising a flask support,

means including a cam for elevating. said flask support, a pair of pivotally supported members having portions movable in a direction opposite to. that'in which the flasksup port moves for subjecting said flask support to sharp blows upon downward movement of said flask support, and a roller pivotally' suspended fromsaid pivotally supported members with which said cam contacts whereby 26 said pivotally supported members are subjected to'movement by said cam. V. 9. A jolter comprising a flask support, a pair of jolting members, shafts for pivotally supporting said jiolting members, a power 5 shaft, means supported bv the first mentioned shafts for rotatably supporting said power shaft, and a cam on said power shaft for imparting vertical movement to said flask sup port. L 30 10;. A jolter comprising a flask support, a pair of jolting members, shafts for pivotally supporting said jolting" members, a power shaft, means supported by the first mentioned shafts for rotatably supporting said power shaft, a cam on said power shaft for imparting vertical movement. to said flask'support, and means for pivotally connecting said jolting members to said flask support.

In testimony whereof, I have hereunto set 4o my hand.

. WALTER H. WANGELINL' 

